Passchier, Cornelis Willem: Mixing in flow perturbations : a model for development of mantled porphyroclasts in mylonites
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Person: Passchier, Cornelis Willem (Autor) 
  
Titel: Mixing in flow perturbations : a model for development of mantled porphyroclasts in mylonites
  
Quelle: Journal of structural geology. Bd. 16. H. 5. Oxford : Pergamon Press. S. 733 - 736
Erscheinungsjahr:    1994
ISBN / ISSN: 0191-8141
URL der Originalveröffentlichung doi:10.1016/0191-8141(94)90123-6
  
Dokumentart:
Zeitschriftenaufsatz Zeitschriftenaufsatz
Sprache: Englisch
Open Access:
Person der Universität:    Passchier, Cornelis Willem  In UnivIS suchen  
Einrichtung: Institut für Geowissenschaften
DDC-Sachgruppe:    Geowissenschaften
ID: 52643  Universitätsbibliothek Mainz
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Informationen zu den Nutzungsrechten unserer Inhalte Informationen zu den Nutzungsrechten unserer Inhalte
Abstract: The presence of a rigid object such as a porphyroclast in simple shear flow induces a flow perturbation with a relatively simple geometry. Domains of closed and open flow lines are bounded by a 'separatrix' that surrounds the porphyroclast. The concept of a separatrix to describe heterogeneous flow gives rise to some new insights in the development of porphyroclasts with a mantle of recrystallized material in mylonites. The final shape of the recrystallized mantle depends on separatrix shape, but also on the degree of intersection of the mantle and the separatrix, and therefore on relative mantle width. This model can explain the coexistence of several types of mantled porphyroclast in a single mylonite sample, the occurrence of porphyroclasts that lack wings at high strain values, and the presence of symmetric winged mantled porphyroclasts in ductile shear zones.
   
  
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